[PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Julia Lawall]

From: Julia Lawall <Julia.Lawall@lip6.fr>

There were two problems in this code: failure of the setup function should
free locally allocated resources like other nearby failures, and the test
if (&info->cmap) can never be false.  To generally clean things up, this
patch reorders the error handling code at the failed label and adds labels
so that the conditionals are not necessary.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
Not tested.

 drivers/video/ep93xx-fb.c |   32 +++++++++++++++++---------------
 1 file changed, 17 insertions(+), 15 deletions(-)

diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
index f8babbe..345d962 100644
--- a/drivers/video/ep93xx-fb.c
+++ b/drivers/video/ep93xx-fb.c
@@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
 
 	err = fb_alloc_cmap(&info->cmap, 256, 0);
 	if (err)
-		goto failed;
+		goto failed_cmap;
 
 	err = ep93xxfb_alloc_videomem(info);
 	if (err)
-		goto failed;
+		goto failed_videomem;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		err = -ENXIO;
-		goto failed;
+		goto failed_resource;
 	}
 
 	/*
@@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
 	fbi->mmio_base = ioremap(res->start, resource_size(res));
 	if (!fbi->mmio_base) {
 		err = -ENXIO;
-		goto failed;
+		goto failed_resource;
 	}
 
 	strcpy(info->fix.id, pdev->name);
@@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
 	if (err = 0) {
 		dev_err(info->dev, "No suitable video mode found\n");
 		err = -EINVAL;
-		goto failed;
+		goto failed_mode;
 	}
 
 	if (mach_info->setup) {
 		err = mach_info->setup(pdev);
 		if (err)
-			return err;
+			goto failed_mode;
 	}
 
 	err = ep93xxfb_check_var(&info->var, info);
 	if (err)
-		goto failed;
+		goto failed_check;
 
 	fbi->clk = clk_get(info->dev, NULL);
 	if (IS_ERR(fbi->clk)) {
 		err = PTR_ERR(fbi->clk);
 		fbi->clk = NULL;
-		goto failed;
+		goto failed_check;
 	}
 
 	ep93xxfb_set_par(info);
@@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
 	return 0;
 
 failed:
-	if (fbi->clk)
-		clk_put(fbi->clk);
-	if (fbi->mmio_base)
-		iounmap(fbi->mmio_base);
-	ep93xxfb_dealloc_videomem(info);
-	if (&info->cmap)
-		fb_dealloc_cmap(&info->cmap);
+	clk_put(fbi->clk);
+failed_check:
 	if (fbi->mach_info->teardown)
 		fbi->mach_info->teardown(pdev);
+failed_mode:
+	iounmap(fbi->mmio_base);
+failed_resource:
+	ep93xxfb_dealloc_videomem(info);
+failed_videomem:
+	fb_dealloc_cmap(&info->cmap);
+failed_cmap:
 	kfree(info);
 	platform_set_drvdata(pdev, NULL);
 

RE: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[H Hartley Sweeten]

On Wednesday, April 18, 2012 12:37 PM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@lip6.fr>
>
> There were two problems in this code: failure of the setup function should
> free locally allocated resources like other nearby failures, and the test
> if (&info->cmap) can never be false.  To generally clean things up, this
> patch reorders the error handling code at the failed label and adds labels
> so that the conditionals are not necessary.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
>

Thanks!

Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>

Re: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Ryan Mallon]

On 19/04/12 05:37, Julia Lawall wrote:

> From: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> There were two problems in this code: failure of the setup function should
> free locally allocated resources like other nearby failures, and the test
> if (&info->cmap) can never be false.  To generally clean things up, this
> patch reorders the error handling code at the failed label and adds labels
> so that the conditionals are not necessary.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Reviewed-by: Ryan Mallon <rmallon@gmail.com>

Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
though, according to git blame, I am the author of 90% of the commits.
Should I have an entry in the MAINTAINERS file, or is
scripts/get_maintainer.pl not working properly?

~Ryan

> ---
> Not tested.
> 
>  drivers/video/ep93xx-fb.c |   32 +++++++++++++++++---------------
>  1 file changed, 17 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
> index f8babbe..345d962 100644
> --- a/drivers/video/ep93xx-fb.c
> +++ b/drivers/video/ep93xx-fb.c
> @@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  
>  	err = fb_alloc_cmap(&info->cmap, 256, 0);
>  	if (err)
> -		goto failed;
> +		goto failed_cmap;
>  
>  	err = ep93xxfb_alloc_videomem(info);
>  	if (err)
> -		goto failed;
> +		goto failed_videomem;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	if (!res) {
>  		err = -ENXIO;
> -		goto failed;
> +		goto failed_resource;
>  	}
>  
>  	/*
> @@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	fbi->mmio_base = ioremap(res->start, resource_size(res));
>  	if (!fbi->mmio_base) {
>  		err = -ENXIO;
> -		goto failed;
> +		goto failed_resource;
>  	}
>  
>  	strcpy(info->fix.id, pdev->name);
> @@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	if (err = 0) {
>  		dev_err(info->dev, "No suitable video mode found\n");
>  		err = -EINVAL;
> -		goto failed;
> +		goto failed_mode;
>  	}
>  
>  	if (mach_info->setup) {
>  		err = mach_info->setup(pdev);
>  		if (err)
> -			return err;
> +			goto failed_mode;
>  	}
>  
>  	err = ep93xxfb_check_var(&info->var, info);
>  	if (err)
> -		goto failed;
> +		goto failed_check;
>  
>  	fbi->clk = clk_get(info->dev, NULL);
>  	if (IS_ERR(fbi->clk)) {
>  		err = PTR_ERR(fbi->clk);
>  		fbi->clk = NULL;
> -		goto failed;
> +		goto failed_check;
>  	}
>  
>  	ep93xxfb_set_par(info);
> @@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	return 0;
>  
>  failed:
> -	if (fbi->clk)
> -		clk_put(fbi->clk);
> -	if (fbi->mmio_base)
> -		iounmap(fbi->mmio_base);
> -	ep93xxfb_dealloc_videomem(info);
> -	if (&info->cmap)
> -		fb_dealloc_cmap(&info->cmap);
> +	clk_put(fbi->clk);
> +failed_check:
>  	if (fbi->mach_info->teardown)
>  		fbi->mach_info->teardown(pdev);
> +failed_mode:
> +	iounmap(fbi->mmio_base);
> +failed_resource:
> +	ep93xxfb_dealloc_videomem(info);
> +failed_videomem:
> +	fb_dealloc_cmap(&info->cmap);
> +failed_cmap:
>  	kfree(info);
>  	platform_set_drvdata(pdev, NULL);
>  
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

RE: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Jingoo Han]

> -----Original Message-----
> From: Ryan Mallon
> Sent: Thursday, April 19, 2012 9:16 AM
> To: Julia Lawall
> Cc: Florian Tobias Schandinat; kernel-janitors@vger.kernel.org; linux-fbdev@vger.kernel.org; linux-
> kernel@vger.kernel.org
> Subject: Re: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code
> 
> On 19/04/12 05:37, Julia Lawall wrote:
> 
> > From: Julia Lawall <Julia.Lawall@lip6.fr>
> >
> > There were two problems in this code: failure of the setup function should
> > free locally allocated resources like other nearby failures, and the test
> > if (&info->cmap) can never be false.  To generally clean things up, this
> > patch reorders the error handling code at the failed label and adds labels
> > so that the conditionals are not necessary.
> >
> > Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> Reviewed-by: Ryan Mallon <rmallon@gmail.com>
> 
> Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
> though, according to git blame, I am the author of 90% of the commits.
> Should I have an entry in the MAINTAINERS file, or is
> scripts/get_maintainer.pl not working properly?

There are optional differences in using scripts/get_maintainer.pl.
If you use './' ahead of file path, you will see your name.

Without './' ahead of 'drivers/video/ep93xx-fb.c':
./scripts/get_maintainer.pl --file drivers/video/ep93xx-fb.c
Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
linux-kernel@vger.kernel.org (open list)

With './' ahead of 'drivers/video/ep93xx-fb.c':
./scripts/get_maintainer.pl --file ./drivers/video/ep93xx-fb.c
Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
linux-kernel@vger.kernel.org (open list)


Best regards,
Jingoo Han

> 
> ~Ryan
> 
> > ---
> > Not tested.
> >
> >  drivers/video/ep93xx-fb.c |   32 +++++++++++++++++---------------
> >  1 file changed, 17 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
> > index f8babbe..345d962 100644
> > --- a/drivers/video/ep93xx-fb.c
> > +++ b/drivers/video/ep93xx-fb.c
> > @@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> >
> >  	err = fb_alloc_cmap(&info->cmap, 256, 0);
> >  	if (err)
> > -		goto failed;
> > +		goto failed_cmap;
> >
> >  	err = ep93xxfb_alloc_videomem(info);
> >  	if (err)
> > -		goto failed;
> > +		goto failed_videomem;
> >
> >  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >  	if (!res) {
> >  		err = -ENXIO;
> > -		goto failed;
> > +		goto failed_resource;
> >  	}
> >
> >  	/*
> > @@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> >  	fbi->mmio_base = ioremap(res->start, resource_size(res));
> >  	if (!fbi->mmio_base) {
> >  		err = -ENXIO;
> > -		goto failed;
> > +		goto failed_resource;
> >  	}
> >
> >  	strcpy(info->fix.id, pdev->name);
> > @@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> >  	if (err = 0) {
> >  		dev_err(info->dev, "No suitable video mode found\n");
> >  		err = -EINVAL;
> > -		goto failed;
> > +		goto failed_mode;
> >  	}
> >
> >  	if (mach_info->setup) {
> >  		err = mach_info->setup(pdev);
> >  		if (err)
> > -			return err;
> > +			goto failed_mode;
> >  	}
> >
> >  	err = ep93xxfb_check_var(&info->var, info);
> >  	if (err)
> > -		goto failed;
> > +		goto failed_check;
> >
> >  	fbi->clk = clk_get(info->dev, NULL);
> >  	if (IS_ERR(fbi->clk)) {
> >  		err = PTR_ERR(fbi->clk);
> >  		fbi->clk = NULL;
> > -		goto failed;
> > +		goto failed_check;
> >  	}
> >
> >  	ep93xxfb_set_par(info);
> > @@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
> >  	return 0;
> >
> >  failed:
> > -	if (fbi->clk)
> > -		clk_put(fbi->clk);
> > -	if (fbi->mmio_base)
> > -		iounmap(fbi->mmio_base);
> > -	ep93xxfb_dealloc_videomem(info);
> > -	if (&info->cmap)
> > -		fb_dealloc_cmap(&info->cmap);
> > +	clk_put(fbi->clk);
> > +failed_check:
> >  	if (fbi->mach_info->teardown)
> >  		fbi->mach_info->teardown(pdev);
> > +failed_mode:
> > +	iounmap(fbi->mmio_base);
> > +failed_resource:
> > +	ep93xxfb_dealloc_videomem(info);
> > +failed_videomem:
> > +	fb_dealloc_cmap(&info->cmap);
> > +failed_cmap:
> >  	kfree(info);
> >  	platform_set_drvdata(pdev, NULL);
> >
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > Please read the FAQ at  http://www.tux.org/lkml/
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

RE: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Julia Lawall]

I don't know thw impact of the ./.  I use the options

--nokeywords --nogit-fallback --subsystem --norolestats -f

julia

On Thu, 19 Apr 2012, Jingoo Han wrote:

>> -----Original Message-----
>> From: Ryan Mallon
>> Sent: Thursday, April 19, 2012 9:16 AM
>> To: Julia Lawall
>> Cc: Florian Tobias Schandinat; kernel-janitors@vger.kernel.org; linux-fbdev@vger.kernel.org; linux-
>> kernel@vger.kernel.org
>> Subject: Re: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code
>>
>> On 19/04/12 05:37, Julia Lawall wrote:
>>
>>> From: Julia Lawall <Julia.Lawall@lip6.fr>
>>>
>>> There were two problems in this code: failure of the setup function should
>>> free locally allocated resources like other nearby failures, and the test
>>> if (&info->cmap) can never be false.  To generally clean things up, this
>>> patch reorders the error handling code at the failed label and adds labels
>>> so that the conditionals are not necessary.
>>>
>>> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
>>
>> Reviewed-by: Ryan Mallon <rmallon@gmail.com>
>>
>> Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
>> though, according to git blame, I am the author of 90% of the commits.
>> Should I have an entry in the MAINTAINERS file, or is
>> scripts/get_maintainer.pl not working properly?
>
> There are optional differences in using scripts/get_maintainer.pl.
> If you use './' ahead of file path, you will see your name.
>
> Without './' ahead of 'drivers/video/ep93xx-fb.c':
> ./scripts/get_maintainer.pl --file drivers/video/ep93xx-fb.c
> Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
> linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
> linux-kernel@vger.kernel.org (open list)
>
> With './' ahead of 'drivers/video/ep93xx-fb.c':
> ./scripts/get_maintainer.pl --file ./drivers/video/ep93xx-fb.c
> Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
> Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
> H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
> Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
> Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
> linux-kernel@vger.kernel.org (open list)
>
>
> Best regards,
> Jingoo Han
>
>>
>> ~Ryan
>>
>>> ---
>>> Not tested.
>>>
>>>  drivers/video/ep93xx-fb.c |   32 +++++++++++++++++---------------
>>>  1 file changed, 17 insertions(+), 15 deletions(-)
>>>
>>> diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
>>> index f8babbe..345d962 100644
>>> --- a/drivers/video/ep93xx-fb.c
>>> +++ b/drivers/video/ep93xx-fb.c
>>> @@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>>>
>>>  	err = fb_alloc_cmap(&info->cmap, 256, 0);
>>>  	if (err)
>>> -		goto failed;
>>> +		goto failed_cmap;
>>>
>>>  	err = ep93xxfb_alloc_videomem(info);
>>>  	if (err)
>>> -		goto failed;
>>> +		goto failed_videomem;
>>>
>>>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>>>  	if (!res) {
>>>  		err = -ENXIO;
>>> -		goto failed;
>>> +		goto failed_resource;
>>>  	}
>>>
>>>  	/*
>>> @@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>>>  	fbi->mmio_base = ioremap(res->start, resource_size(res));
>>>  	if (!fbi->mmio_base) {
>>>  		err = -ENXIO;
>>> -		goto failed;
>>> +		goto failed_resource;
>>>  	}
>>>
>>>  	strcpy(info->fix.id, pdev->name);
>>> @@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>>>  	if (err = 0) {
>>>  		dev_err(info->dev, "No suitable video mode found\n");
>>>  		err = -EINVAL;
>>> -		goto failed;
>>> +		goto failed_mode;
>>>  	}
>>>
>>>  	if (mach_info->setup) {
>>>  		err = mach_info->setup(pdev);
>>>  		if (err)
>>> -			return err;
>>> +			goto failed_mode;
>>>  	}
>>>
>>>  	err = ep93xxfb_check_var(&info->var, info);
>>>  	if (err)
>>> -		goto failed;
>>> +		goto failed_check;
>>>
>>>  	fbi->clk = clk_get(info->dev, NULL);
>>>  	if (IS_ERR(fbi->clk)) {
>>>  		err = PTR_ERR(fbi->clk);
>>>  		fbi->clk = NULL;
>>> -		goto failed;
>>> +		goto failed_check;
>>>  	}
>>>
>>>  	ep93xxfb_set_par(info);
>>> @@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>>>  	return 0;
>>>
>>>  failed:
>>> -	if (fbi->clk)
>>> -		clk_put(fbi->clk);
>>> -	if (fbi->mmio_base)
>>> -		iounmap(fbi->mmio_base);
>>> -	ep93xxfb_dealloc_videomem(info);
>>> -	if (&info->cmap)
>>> -		fb_dealloc_cmap(&info->cmap);
>>> +	clk_put(fbi->clk);
>>> +failed_check:
>>>  	if (fbi->mach_info->teardown)
>>>  		fbi->mach_info->teardown(pdev);
>>> +failed_mode:
>>> +	iounmap(fbi->mmio_base);
>>> +failed_resource:
>>> +	ep93xxfb_dealloc_videomem(info);
>>> +failed_videomem:
>>> +	fb_dealloc_cmap(&info->cmap);
>>> +failed_cmap:
>>>  	kfree(info);
>>>  	platform_set_drvdata(pdev, NULL);
>>>
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>> Please read the FAQ at  http://www.tux.org/lkml/
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
> --
> To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>

RE: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Joe Perches]

On Thu, 2012-04-19 at 07:14 +0200, Julia Lawall wrote:
> I don't know thw impact of the ./.  I use the options
> 
> --nokeywords --nogit-fallback --subsystem --norolestats -f
> 
> julia
> 
> On Thu, 19 Apr 2012, Jingoo Han wrote:
> 
> >> -----Original Message-----
> >> From: Ryan Mallon
[]
> >> Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
> >> though, according to git blame, I am the author of 90% of the commits.
> >> Should I have an entry in the MAINTAINERS file, or is
> >> scripts/get_maintainer.pl not working properly?
> >
> > There are optional differences in using scripts/get_maintainer.pl.
> > If you use './' ahead of file path, you will see your name.
> >
> > Without './' ahead of 'drivers/video/ep93xx-fb.c':
> > ./scripts/get_maintainer.pl --file drivers/video/ep93xx-fb.c
> > Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
> > linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
> > linux-kernel@vger.kernel.org (open list)
> >
> > With './' ahead of 'drivers/video/ep93xx-fb.c':
> > ./scripts/get_maintainer.pl --file ./drivers/video/ep93xx-fb.c
> > Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
> > Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
> > H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
> > Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
> > Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
> > linux-kernel@vger.kernel.org (open list)

Prefixing "./" to the file path bypasses the normal
get_maintainers pattern check for file maintainership.

Florian Schandinat and linux-fbdev are not returned
in the second lookup above.

One of the patterns for FRAMEBUFFER is
F:	drivers/video/
which is a direct match for is ep93xx-fb.c file,
so --git is not used by default.

Adding --git may be appropriate and it also returns
Ryan's name in this case.

$ ./scripts/get_maintainer.pl -f drivers/video/ep93xx-fb.c
Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
linux-kernel@vger.kernel.org (open list)

$ ./scripts/get_maintainer.pl --git -f drivers/video/ep93xx-fb.c
Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
linux-kernel@vger.kernel.org (open list)

Nominally, as framebuffer maintainer, Florian
should also have "signed-off" on these commits,
but many subsystems don't actually have a
single path or person for patches and commits.

This file came into the tree via Andrew Morton.

Another way to investigate who actually does
work on an individual file is to use the
get_maintainer.pl option "--interactive".

That can give you an output like:

*  # email/list and role:stats                                        auth sign
*  1 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>             
     maintainer:FRAMEBUFFER LAYER
*  2 Ryan Mallon <rmallon@gmail.com>                                     4    4
     commit_signer:2/3g%,authored lines:645/650™%,commits:4/8P%
*  3 Paul Gortmaker <paul.gortmaker@windriver.com>                       1    1
     commit_signer:1/33%,commits:1/8\x12%
*  4 H Hartley Sweeten <hsweeten@visionengravers.com>                    0    2
     commit_signer:1/33%,commits:2/8%%
*  5 Jesper Juhl <jj@chaosbits.net>                                      0    1
     commit_signer:1/33%
*  6 Jiri Kosina <jkosina@suse.cz>                                       0    1
     commit_signer:1/33%
*  7 Andrew Morton <akpm@linux-foundation.org>                           0    2
     commits:2/8%%
*  8 Russell King <rmk+kernel@arm.linux.org.uk>                          0    1
     commits:1/8\x12%
*  9 linux-fbdev@vger.kernel.org                                      
     open list:FRAMEBUFFER LAYER
* 10 linux-kernel@vger.kernel.org                                     
     open list

About maintainership for individual files:

If anyone thinks they are the maintainer for
a particular file, generally they should submit
a patch to MAINTAINERS adding a section with
their name, maintainership level and an
appropriate file pattern.

Re: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Ryan Mallon]

On 24/04/12 22:46, Joe Perches wrote:

> On Thu, 2012-04-19 at 07:14 +0200, Julia Lawall wrote:
>> I don't know thw impact of the ./.  I use the options
>>
>> --nokeywords --nogit-fallback --subsystem --norolestats -f
>>
>> julia
>>
>> On Thu, 19 Apr 2012, Jingoo Han wrote:
>>
>>>> -----Original Message-----
>>>> From: Ryan Mallon
> []
>>>> Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
>>>> though, according to git blame, I am the author of 90% of the commits.
>>>> Should I have an entry in the MAINTAINERS file, or is
>>>> scripts/get_maintainer.pl not working properly?
>>>
>>> There are optional differences in using scripts/get_maintainer.pl.
>>> If you use './' ahead of file path, you will see your name.
>>>
>>> Without './' ahead of 'drivers/video/ep93xx-fb.c':
>>> ./scripts/get_maintainer.pl --file drivers/video/ep93xx-fb.c
>>> Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
>>> linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
>>> linux-kernel@vger.kernel.org (open list)
>>>
>>> With './' ahead of 'drivers/video/ep93xx-fb.c':
>>> ./scripts/get_maintainer.pl --file ./drivers/video/ep93xx-fb.c
>>> Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
>>> Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
>>> H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
>>> Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
>>> Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
>>> linux-kernel@vger.kernel.org (open list)
> 
> Prefixing "./" to the file path bypasses the normal
> get_maintainers pattern check for file maintainership.
> 
> Florian Schandinat and linux-fbdev are not returned
> in the second lookup above.
> 
> One of the patterns for FRAMEBUFFER is
> F:	drivers/video/
> which is a direct match for is ep93xx-fb.c file,
> so --git is not used by default.
> 
> Adding --git may be appropriate and it also returns
> Ryan's name in this case.


Hi Joe,

Thanks for the info.

> Nominally, as framebuffer maintainer, Florian
> should also have "signed-off" on these commits,
> but many subsystems don't actually have a
> single path or person for patches and commits.

> 
> This file came into the tree via Andrew Morton.
> 

The original driver was written before Florian became the 
framebuffer maintainer. The subsystem had no real maintainer
at the time, which is why it went via Andrew.

> About maintainership for individual files:
> 
> If anyone thinks they are the maintainer for
> a particular file, generally they should submit
> a patch to MAINTAINERS adding a section with
> their name, maintainership level and an
> appropriate file pattern.


Hmm, perhaps author is a better term than maintainer here. Any 
patches should still go via the framebuffer maintainer, Florian,
but it would be useful in many cases for the original and/or
most regular commit author to also get Cc'ed since in many
cases they will have a better understanding of the code, even
if the aren't "maintaining" it.

~Ryan

RE: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Jingoo Han]

On Tue, 24 Apr 2012, Joe Perches wrote:
> -----Original Message-----
> On Thu, 2012-04-19 at 07:14 +0200, Julia Lawall wrote:
> > I don't know thw impact of the ./.  I use the options
> >
> > --nokeywords --nogit-fallback --subsystem --norolestats -f
> >
> > julia
> >
> > On Thu, 19 Apr 2012, Jingoo Han wrote:
> >
> > >> -----Original Message-----
> > >> From: Ryan Mallon
> []
> > >> Oddly, scripts/get_maintainer.pl on this file doesn't return me, even
> > >> though, according to git blame, I am the author of 90% of the commits.
> > >> Should I have an entry in the MAINTAINERS file, or is
> > >> scripts/get_maintainer.pl not working properly?
> > >
> > > There are optional differences in using scripts/get_maintainer.pl.
> > > If you use './' ahead of file path, you will see your name.
> > >
> > > Without './' ahead of 'drivers/video/ep93xx-fb.c':
> > > ./scripts/get_maintainer.pl --file drivers/video/ep93xx-fb.c
> > > Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
> > > linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
> > > linux-kernel@vger.kernel.org (open list)
> > >
> > > With './' ahead of 'drivers/video/ep93xx-fb.c':
> > > ./scripts/get_maintainer.pl --file ./drivers/video/ep93xx-fb.c
> > > Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
> > > Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
> > > H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
> > > Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
> > > Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
> > > linux-kernel@vger.kernel.org (open list)
> 
> Prefixing "./" to the file path bypasses the normal
> get_maintainers pattern check for file maintainership.
> 
> Florian Schandinat and linux-fbdev are not returned
> in the second lookup above.
> 
> One of the patterns for FRAMEBUFFER is
> F:	drivers/video/
> which is a direct match for is ep93xx-fb.c file,
> so --git is not used by default.
> 
> Adding --git may be appropriate and it also returns
> Ryan's name in this case.
> 
> $ ./scripts/get_maintainer.pl -f drivers/video/ep93xx-fb.c
> Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
> linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
> linux-kernel@vger.kernel.org (open list)
> 
> $ ./scripts/get_maintainer.pl --git -f drivers/video/ep93xx-fb.c
> Florian Tobias Schandinat <FlorianSchandinat@gmx.de> (maintainer:FRAMEBUFFER LAYER)
> Ryan Mallon <rmallon@gmail.com> (commit_signer:2/3g%)
> Paul Gortmaker <paul.gortmaker@windriver.com> (commit_signer:1/33%)
> H Hartley Sweeten <hsweeten@visionengravers.com> (commit_signer:1/33%)
> Jesper Juhl <jj@chaosbits.net> (commit_signer:1/33%)
> Jiri Kosina <jkosina@suse.cz> (commit_signer:1/33%)
> linux-fbdev@vger.kernel.org (open list:FRAMEBUFFER LAYER)
> linux-kernel@vger.kernel.org (open list)
> 
> Nominally, as framebuffer maintainer, Florian
> should also have "signed-off" on these commits,
> but many subsystems don't actually have a
> single path or person for patches and commits.
> 
> This file came into the tree via Andrew Morton.
> 
> Another way to investigate who actually does
> work on an individual file is to use the
> get_maintainer.pl option "--interactive".

Thank you for your reply.
It is very helpful.

Best regards,
Jingoo Han

> 
> That can give you an output like:
> 
> *  # email/list and role:stats                                        auth sign
> *  1 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
>      maintainer:FRAMEBUFFER LAYER
> *  2 Ryan Mallon <rmallon@gmail.com>                                     4    4
>      commit_signer:2/3g%,authored lines:645/650™%,commits:4/8P%
> *  3 Paul Gortmaker <paul.gortmaker@windriver.com>                       1    1
>      commit_signer:1/33%,commits:1/8\x12%
> *  4 H Hartley Sweeten <hsweeten@visionengravers.com>                    0    2
>      commit_signer:1/33%,commits:2/8%%
> *  5 Jesper Juhl <jj@chaosbits.net>                                      0    1
>      commit_signer:1/33%
> *  6 Jiri Kosina <jkosina@suse.cz>                                       0    1
>      commit_signer:1/33%
> *  7 Andrew Morton <akpm@linux-foundation.org>                           0    2
>      commits:2/8%%
> *  8 Russell King <rmk+kernel@arm.linux.org.uk>                          0    1
>      commits:1/8\x12%
> *  9 linux-fbdev@vger.kernel.org
>      open list:FRAMEBUFFER LAYER
> * 10 linux-kernel@vger.kernel.org
>      open list
> 
> About maintainership for individual files:
> 
> If anyone thinks they are the maintainer for
> a particular file, generally they should submit
> a patch to MAINTAINERS adding a section with
> their name, maintainership level and an
> appropriate file pattern.

Re: [PATCH] drivers/video/ep93xx-fb.c: clean up error-handling code

[Florian Tobias Schandinat]

On 04/18/2012 07:37 PM, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> There were two problems in this code: failure of the setup function should
> free locally allocated resources like other nearby failures, and the test
> if (&info->cmap) can never be false.  To generally clean things up, this
> patch reorders the error handling code at the failed label and adds labels
> so that the conditionals are not necessary.
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Applied.


Thanks,

Florian Tobias Schandinat

> 
> ---
> Not tested.
> 
>  drivers/video/ep93xx-fb.c |   32 +++++++++++++++++---------------
>  1 file changed, 17 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/video/ep93xx-fb.c b/drivers/video/ep93xx-fb.c
> index f8babbe..345d962 100644
> --- a/drivers/video/ep93xx-fb.c
> +++ b/drivers/video/ep93xx-fb.c
> @@ -507,16 +507,16 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  
>  	err = fb_alloc_cmap(&info->cmap, 256, 0);
>  	if (err)
> -		goto failed;
> +		goto failed_cmap;
>  
>  	err = ep93xxfb_alloc_videomem(info);
>  	if (err)
> -		goto failed;
> +		goto failed_videomem;
>  
>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	if (!res) {
>  		err = -ENXIO;
> -		goto failed;
> +		goto failed_resource;
>  	}
>  
>  	/*
> @@ -532,7 +532,7 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	fbi->mmio_base = ioremap(res->start, resource_size(res));
>  	if (!fbi->mmio_base) {
>  		err = -ENXIO;
> -		goto failed;
> +		goto failed_resource;
>  	}
>  
>  	strcpy(info->fix.id, pdev->name);
> @@ -553,24 +553,24 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	if (err = 0) {
>  		dev_err(info->dev, "No suitable video mode found\n");
>  		err = -EINVAL;
> -		goto failed;
> +		goto failed_mode;
>  	}
>  
>  	if (mach_info->setup) {
>  		err = mach_info->setup(pdev);
>  		if (err)
> -			return err;
> +			goto failed_mode;
>  	}
>  
>  	err = ep93xxfb_check_var(&info->var, info);
>  	if (err)
> -		goto failed;
> +		goto failed_check;
>  
>  	fbi->clk = clk_get(info->dev, NULL);
>  	if (IS_ERR(fbi->clk)) {
>  		err = PTR_ERR(fbi->clk);
>  		fbi->clk = NULL;
> -		goto failed;
> +		goto failed_check;
>  	}
>  
>  	ep93xxfb_set_par(info);
> @@ -585,15 +585,17 @@ static int __devinit ep93xxfb_probe(struct platform_device *pdev)
>  	return 0;
>  
>  failed:
> -	if (fbi->clk)
> -		clk_put(fbi->clk);
> -	if (fbi->mmio_base)
> -		iounmap(fbi->mmio_base);
> -	ep93xxfb_dealloc_videomem(info);
> -	if (&info->cmap)
> -		fb_dealloc_cmap(&info->cmap);
> +	clk_put(fbi->clk);
> +failed_check:
>  	if (fbi->mach_info->teardown)
>  		fbi->mach_info->teardown(pdev);
> +failed_mode:
> +	iounmap(fbi->mmio_base);
> +failed_resource:
> +	ep93xxfb_dealloc_videomem(info);
> +failed_videomem:
> +	fb_dealloc_cmap(&info->cmap);
> +failed_cmap:
>  	kfree(info);
>  	platform_set_drvdata(pdev, NULL);
>  
> 
>